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NTTED STATES PATENT OFFICE.

FRANCIS I. MAULE, OF PHILADELPHIA, PENNSYLVANIA.

PIPE-CUTTING IM PLEM ENT.

SPECIFICATION forming part of Letters Pate-nt No. 249,966, datedNovember 22, 1881.

Application filed October 3, 1881. (No model.)

To all whom it may concern:

Beit known that I, FRANoIs I. MAULE, a citizen ofthe United States,residing in Philadelphia, Pennsylvania, have invented certainImprovements in Pipe-Cutting Implements,of which the following is aspecification.

My invention relates to certain improvements in the class ofpipe-cuttingtools ofwhieh that described in my PatentNo. 225,403, March 9,1880, isan example, and the object of my improvements, which are fully describedhereinafter, is economy in the construction of the tool.

In the accompanying drawings, Figure l is a side View, partly insection, of my improved pipe-cutting tool; Fig. 2, a section on the linel 2, and Fig. 3 a section on the line 3 4.

The bent end a of the head A of the tool, with its angular piece b ofhardened steel, constitutes theja-W against which the pipe tofybe cut isforced, and by whichit is prevented from turning, the bead itself` beingpreferably made of malleable cast-iron, and the portion d of the headbeing madein the form of a hollow cylinder, within which a cylindricalblock, c, lits snugly, but so as to slide freely, but is prevented fromturning by the end of a set-screw, f, the latter extending into alongitudinal groove in the block. The cylindrical portion d ofthe headis threaded internally at one end for the reception of the threaded endh of the nut B, which is screwed tight into its place, so as to become apermanent part of the head, being retained, it' desired, by a suitabletransverse pin or bolt. The nut is threaded internally throughout aportion of its length, this portion being adapted to the threaded partt' ofthe rod D, and the remaining portion ofthe interior Iof the nutbeing plain or Unthreaded, so as to serve as a guide for the rod andprevent the exertion of undue strain on the threaded portions of the nutand rod in manipulating the tool.

In the outer end of the block c is a slot for receiving the rotarycutter m, which turns on a pin, a, passing through the block.

The objectin making the tool in the peculiar manner described is economyin construction.

Au accurate fit of the block e in the cylindrical portion of the head isinsured by boring the latter and turning the former, and it is Wellknown to practical machinists that theseoperations-turningandboring-arethecheapest of all machine-shopprocesses, the cost of production being always increased by milling orplaning' objects one of which has to t accurately-into the oth er, andstill further increased when recourse is had to manipulative operations,such as filing or chipping.

A peculiar manner of making the handle G of the rod D and securing it tothe latter is lanother economical feature of my invention.

This handle is made of cast-iron, is hollow, partly for insuringlightness, is elongated, as shown in Fig. 3, and is rounded on the edgesand ends. A mold is made in sand to accord with this handle, and the endportion of the rod having been introduced into the mold the molten metalis cast in the same. The rod, prior to its insertion in the mold, isflattened at the end w, so as to form a dovetaihwhich is embraced by themetal on one side of the handle, the metal on the opposite sideembracing the rod at y and serving t-o relieve the dovetail from unduestrains.

The manner of using'the implement in severing tubes will be readilyunderstood Without Y explanation.

I claim as my invention-- 1. The combination of the head, itscyliudrical portion d, and cylindrical block e, with the nut B, adaptedto be screwed into the said cylindrical portion of the block, and thethreaded rod D, adapted to the internal thread of the nut, allsubstantially as specied.

2. The combination of the rod D, threaded at its upper end and flared orflattened at its lowerend,with the hollow handle G,castaroundandembracing the dared end of the rod, as

Aset forth.

I FRANCIS I. MAULE. Witnesses HARRY DRURY, HARRY SMITH.

